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參數資料
| 型號： | W77IE58 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8-BIT, FLASH, 25 MHz, MICROCONTROLLER, PDIP40 |
| 封裝： | DIP-40 |
| 文件頁數： | 11/90頁 |
| 文件大小： | 409K |
| 代理商： | W77IE58 |
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Preliminary W77IE58
Publication Release Date: July 2000
- 11 -
Revision A1
Data Memory
The W77IE58 can access up to 64Kbytes of external Data Memory. This memory region is accessed by
the MOVX instructions. Unlike the 8051 derivatives, the W77IE58 contains on-chip 1K bytes MOVX
SRAM of Data Memory, which can only be accessed by MOVX instructions. These 1K bytes of SRAM
are between address 0000H and 03FFH. Access to the on-chip MOVX SRAM is optional under software
control. When enabled by software, any MOVX instruction that uses this area will go to the on-chip
RAM. MOVX addresses greater than 03FFH automatically go to external memory through Port 0 and 2.
When disabled, the 1KB memory area is transparent to the system memory map. Any MOVX directed
to the space between 0000H and FFFFH goes to the expanded bus on Port 0 and 2. This is the default
condition. In addition, the W77IE58 has the standard 256 bytes of on-chip Scratchpad RAM. This can be
accessed either by direct addressing or by indirect addressing. There are also some Special Function
Registers (SFRs), which can only be accessed by direct addressing. Since the Scratchpad RAM is only
256 bytes, it can be used only when data contents are small. In the event that larger data contents are
present, two selections can be used. One is on-chip MOVX SRAM , the other is the external Data
Memory. The on-chip MOVX SRAM can only be accessed by a MOVX instruction, the same as that for
external Data Memory. However, the on-chip RAM has the fastest access times.
0000h
FFFFh
80h
7Fh
00h
64 K
Bytes
External
Data
Memory
Indirect
Addressing
RAM
Direct &
Indirect
Addressing
RAM
SFRs
Direct
Addressing
FFh
FFFFh
0000h
External
Program
Memory
7FFFh
32K Bytes
On-chip
Program
Memory
1K Bytes
On-chip SRAM
0000h
03FFh
Figure 1. Memory Map
相關PDF資料 |
PDF描述 |
|---|---|
| W77L32 | 8-BIT MICROCONTROLLER |
| W77LE532 | 8 BIT MICROCONTROLLER |
| W77LE58 | 8 BIT MICROCONTROLLER |
| W77LE58-25 | 8 BIT MICROCONTROLLER |
| W77LE58F-25 | 8 BIT MICROCONTROLLER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W77IE58_06 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W77J_1G WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| W77J_2GST WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| W77J_3G WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| W77L032A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
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